Bugfix for unwind: Don't assume formatting

Fixes #6
Modernize require functions

- more flexible add-require-to-ns
- add-use-to-ns is now a :require with :refer :all - and the :all is replaceable.
Release 0.5.0
add (untested) support for threading and unwinding of some-> and some->>
move forward more characters to account fome longer some->